In a shockingly frank interview, Jeremiah, who was banned from attending the Old Bailey for some of his brother's trial for security reasons, said: "I suggest that it won't be the last, simply because of the tactics of the British secret service and foreign policy. For every violent action is a violent reaction."

He went on: "Is it justified for a Muslim to attack a member of an army that is occupying Muslim lands?"

"This is something for the scholars and I think it's obvious to most people," he added. "The events to me were inevitable. There was eventually going to be another attack which mentioned foreign policy as its justification."

In the interview, Jeremiah argues that questions should be asked of the conduct of British armed forces.

He said: "I would say, was Lee Rigby a violent individual? Are other British soldiers who go to Afghanistan and Iraq and kill violent individuals?"

Jeremiah also claimed his brother's actions were a direct consequence of the West's "war on terror" and likened the killing of Fusilier Rigby to U.S. drone strikes on Muslim countries.

He said: "The point he's trying to make is the fact that the geographical location of the battlefield, since this war on terror, has basically disappeared. When we have people driving on roads in Afghanistan and targeted by drones, we have to ask ourselves the question, are these people soldiers? Is this a battlefield?"

He told Al Jazeera his brother was not radicalised, despite associations with radical preachers and the now disbanded group al Muhajiroun.

He said: "It's a very tidy narrative to assume that we have this young Christian boy who was radicalised by these bogeymen-like figures - Anjem Choudary, Omar Bakri Muhammad - and while he went on this conveyor belt, as it were, of radicalisation and then the events of Woolwich happened. It's just not true."

Jeremiah claimed the British security services were aware of alleged mistreatment of his brother by Kenyan police while he was in custody in 2010 and added: "They were complicit in allowing him to be interrogated with the means of interrogation that the Kenyans chose. Questions are to be asked about why they allowed the Kenyans to torture a British citizen."

Jeremiah said he has been approached by an MI5 officer assigned to his brother, adding the security services were "putting a lot of pressure" on Adebolajo and were "really disrupting his life" right up to "a few months before" the Woolwich attack.

An HM Courts and Tribunals Service spokeswoman confirmed Jeremiah was banned from the Old Bailey "for security reasons" but this was later lifted.